EVALUATION KIT AVAILABLE MAX15058 High-Efficiency, 3A, Current-Mode Synchronous, Step-Down Switching Regulator General Description Features The MAX15058 high-efficiency, current-mode, synchro- Internal 30m (typ) R High-Side and 18m DS(ON) nous step-down switching regulator with integrated power (typ) Low-Side MOSFETs at 5V switches delivers up to 3A of output current. The device Continuous 3A Output Current Over Temperature operates from 2.7V to 5.5V and provides an output volt- 95% Efficiency with 3.3V Output at 3A age from 0.6V up to 94% of the input voltage, making 1% Output Voltage Accuracy Over Load, Line, and the device ideal for distributed power systems, portable devices, and preregulation applications. Temperature The MAX15058 utilizes a current-mode control architec- Operates from 2.7V to 5.5V Supply ture with a high-gain transconductance error amplifier. Cycle-by-Cycle Overcurrent Protection The current-mode control architecture facilitates easy Adjustable Output from 0.6V to Up to 0.94 x V IN compensation design and ensures cycle-by-cycle current Programmable Soft-Start limit with fast response to line and load transients. Factory-Trimmed, 1MHz Switching Frequency The MAX15058 offers selectable skip-mode functional- ity to reduce current consumption and achieve a higher Stable with Low-ESR Ceramic Output Capacitors efficiency at light output load. The low R integrated DS(ON) Safe-Startup Into Prebiased Output switches ensure high efficiency at heavy loads while External Reference Input minimizing critical inductances, making the layout design a much simpler task with respect to discrete solutions. Skip-Mode Functionality Utilizing a simple layout and footprint assures first-pass Enable Input/Power-Good Output success in new designs. Fully Protected Against Overcurrent and The MAX15058 features a 1MHz, factory-trimmed, fixed- Overtemperature frequency PWM mode operation. The high switching fre- Input Undervoltage Lockout quency, along with the PWM current-mode architecture, allows for a compact, all-ceramic capacitor design. Ordering Information The MAX15058 offers a capacitor-programmable soft- PART TEMP RANGE PIN-PACKAGE start reducing inrush current, startup into PREBIAS opera- MAX15058EWL+ -40C to +85C 9 WLP tions, and a PGOOD open-drain output that can be used as an interrupt and for power sequencing. +Denotes a lead(Pb)-free/RoHS-compliant package. The MAX15058 is available in a 9-bump (3 x 3 array), Typical Operating Circuit 1.5mm x 1.5mm WLP package and is specified over the -40C to +85C temperature range. INPUT OUTPUT 2.8V TO 5.5V 1.8V/3A IN LX Applications MAX15058 Distributed Power Systems GND Preregulators for Linear Regulators PGOOD Portable Devices FB Notebook Power ON EN ENABLE COMP Server Power OFF SKIP IP Phones SS/REFIN 19-5478 Rev 2 7/11MAX15058 High-Efficiency, 3A, Current-Mode Synchronous, Step-Down Switching Regulator Absolute Maximum Ratings IN, PGOOD to GND ................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A LX to GND ..................................................-0.3V to (V + 0.3V) 9-Bump WLP Multilayer Board IN LX to GND ...................................... -1V to (V + 0.3V) for 50ns (derate 14.1mW/C above T = +70C) ....................1127mW IN A EN, COMP, FB, SS/REFIN, SKIP to GND .-0.3V to (V + 0.3V) Operating Temperature Range ........................... -40C to +85C IN LX Current (Note 1) .................................................... -6A to +6A Storage Temperature Range ............................ -65C to +150C Output Short-Circuit Duration ....................................Continuous Soldering Temperature (reflow) .......................................+260C Note 1: LX has internal clamp diodes to GND and IN. Applications that forward bias these diodes should not exceed the ICs pack- age power dissipation limits. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information PACKAGE TYPE: 9 WLP Package Code W91E1Z+1 Outline Number 21-0508 Land Pattern Number Refer to Application Note 1891 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) 71C/W JA Junction to Case ( ) 26C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Maxim Integrated 2 www.maximintegrated.com